.header {
  width: 100vw;
  height: 44px;
  line-height: 44px;
  text-align: center;
  position: fixed;
  top: 0;
  left: 0;
  background: #1890ff;
  color: white;
  font-size: 17px;
  z-index: 20;

  .title-left {
    position: absolute;
    left: 16px;
    top: 0;
    height: 44px;
    line-height: 44px;
  }
  .title-center {
    position: absolute;
    left: 20%;
    right: 20%;
    top: 0;
    height: 44px;
    line-height: 44px;
    text-align: center;
  }
  .title-right {
    position: absolute;
    right: 16px;
    top: 0;
    height: 44px;
  }
}
